Hiusing beta v2
When you are selecting what to upload to the phone, the dialogue is very crude and underpowered, it should be the full windows open file requester which allows multiple files or folders to be opened at once.

When you click to upload again later on, it should remember which directory you were last viewing in, so you dont have to tool in to the same location again (usually if you are uploading folders of music, they will be in a similar place on the HD)

When uploading to phone, it would be good to see where it is copying to and from.